Just a few days back, Google launched their Mail Assistant. And when the service was released, Google had announced that the users who get to use the subscription service, would be able to send invites so that their friends can get their hands on the service too.
A person using the service can send out only three invites. And so as to be able send out invites, launch the app. Then click on the compose button, and then choose the “Golden Ticket” option. Doing this will send the invite to your friend via an email. Though it is uncertain that Google will let users send more than three invites in near future, but the count at the point of time is just 3.
Also not only this, those who did not get any of the invites from their friends, Google also has been rolling out Official invites, all you need to do is just be patient, and it would arrive soon enough. Look at the video below to know more about the Inbox.